Search Catalog By Keyword By Item # All Categories HIPS Washers | Shipping | Tax | Terms Request for Quote 0 Items All Categories > Washer Material Specifications > HIPS Washers > Advanced Search Advanced Search in HIPS Washers Enter at least one criteria to search items. Material HIPS Outside Diameter (in) At Least : No More Than : Available Range: 0.092 to 4.353 in larger image Inside Diameter (in) At Least : No More Than : Available Range: 0.027 to 3.277 in Thickness (in) At Least : No More Than : Available Range: 0.02 to 0.04 in Description Our standard washers are made from white opaque High Impact Polystyrene (HIPS) HIPS FDA 21 CFR177.1640 UL 94 HB